I think the raid and invasion should be overhauled. Keep the event troops and sigil but make it so that you randomly spawn a raid or invasion event by winning a PvP match. The raid boss should be the only troop you face with lots of hit points that progressively get higher every time you beat one and all guild fight the same exact boss til he is dead or time runs out. The pets are more of a raid than the so called raid event is. Also make it so that you can use any troops but the kingdom of the week get a huge stat boost if used against a raid boss.